Scaffolding



Feb. 7, 1933. A KOLVQORD 1,896,688

SCAFFOLDING Filed April 10, 1931 mm: H m

INVENTOR ATTORNEYS Patented Feb. 7, 1933 UNITED STATES.

ALBERT KOLVOORD, F AUGUSTA, MICHIGAN SCAFIOIJDING Application am April 10,

My invention relatesto scaffolding, and more particularly to means for supporting a. horizontal platform of the type used by painters and the like adjacent a vertical wall.

Some of the desirable characteristics of the scaffold of my invention areits light weight, adjustable height, ease of setting up and taking down,adjustability for uneven ground, and its mobility.

These and other desirable characteristics will become apparent by a reading of the following description taken in connection with the accompanying drawing.

In the drawing, Fig. 1 is a plan view partially broken away of a scafiold constructed in accordance with my invention;

Fig. 2 is a view in end elevation of the scaffold shown in Fig. 1 on an enlarged scale;

Fig. 3 is a cross sectional view taken on line 3--3 of Fig. 1 on a greatly enlarged scale;

Fig- 4 is an enlarged view of the forkedmember spacing-assembly partly in section;

' Fig. 5 is a cross sectional view taken on line 55 of Fig. 4 on an enlarged scale; and

Fig. 6 is a plan view of the base.

Referring to the drawing, the numeral 1 indicates a verticalwall having a platform 2 suspended'near it by means of cables 3, preferably rope or the like. The cables 3 terminate in a hook 4 that engages a link 5, which'is in turn supported by an arm 6 in the form of an elliptical hoop or ring. As shown in Fig. 5, the arm 6 is fixed to a forked member 7 V by means of welding or the like. The forked member 7 is adapted to engage and space supporting columns 8 away from the Wall 1. I

The supporting columns 8 may be made of any suitable light weight material such as an alloy of aluminum and steel, and they may be made in any desired shape, such, for example, as T shape or tubular shape. In the embodiment I have shown the supporting columns as being made of'tubular shape because I deem this shape preferable.

. The forked member 7 may. be made of any strong material such as iron" or steel but I prefer to use steel forging for this purpose. The lower part of the forked member ex- 1931. Serial No. 529,073-

preferably is a short tube, is preferably welded at a convenient angle tojthe top of the channel 11 as shownby Fig. 2. The supporting column is secured to the stud 10 by meansof a bolt 12. a

The outer ends of the base 11 are provided with holes 13 through which extend braces 14 that are secured to thesides of the sup-- porting column 8 by means of a bolt 15.

tends down into the. tubular supporting col- The braces are provided with a number of spaced openings so that the bracesl4: may be moved relative thereto independently of each other to take care of variations in the level of the supporting surface on which the scaffold is supported. The lower ends of the braces 14 extend into and engage the supporting surface, such asthe. ground, and prevent the scaffold from slipping.

The upper ends of the braces are shaped so as to register with the shape of the su porting column and so as to sec'ure'a tig t fit. Several holes are also provided in the upper end of each brace so as to facilitate its connection with the supporting column.

In the embodiment illustrated in Figs. 1 and 2 the supporting column 8 is made up of two tubular members 16 and 17 that are telescoped together. These members may be secured together in any suitable manner as, for example, by means of a bolt 18. A plurality of spaced holes are preferably provided extending through the members 16 and 17 so that the over-alllength of the sup porting column 8 may be changed by removing the bolt 18, moving the members relative to each other, and then. re-inserting the bolt 18. p

A number of holes are provided in the lower part of the braces 14 to provide for the insertion of pins 19 so that the entire structure may be readily moved from place to place without fear of the base slipping past the lower end of the braces. WVhile I prefer to insert the pins 19 in the braces below the base, it will, of course, be understood that similar pins may be inserted on either the top, or bottom, or both sides of the base.

As mentioned above the supporting column is made of light weight material so as to decrease the weight of the entire scaffold. The smaller members, such as the forked member 7, the base and the braces, are preferably made of strong material such as steel and/or steel forgings. This, however, is really my preference, it being understood that any material of suitable strength may be used for the different parts of the scaffold.

While I have illustrated and described a preferred modification of my invention, it will be understood that various changes may be made therein without departing from the spirit and scope of the broader claims appended hereto.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a seafiold, a supporting tubular member, a forked member mounted in said tubular member and having prongs and an arm fixed to the forked member at the base of said prongs and engaging the top of said tubular member.

2. In a scaffold, a base having brace holes, a supporting column mounted thereon, braces for the column extending from the sides thereof through said holes in the base, and means for securing the braces in adjusted positions relative to thecolumn.

3. A scafiold comprising a channel base adapted to rest on a supporting surface. a supporting column pivotally mounted on said base. a spacing and wall-engaging forked member secured to the top of said column, and braces extending from the sides of the column to the outer ends of the base.

4. A scaffold comprising a base adapted to rest on a supporting surface and having brace holes, a supporting column mounted on said base. a spacing and wall-engaging forked member secured to the top of said column, and braces extending from the sides of the column to the outer ends of the base, said. braces passing through said holes in the base for engaging the supporting surface.

5. A scaffold comprising a base adapted to rest on a supporting surface and haying brace holes, a supporting column pivotally mounted on said base, a spacing and wallengaging forked member secured to the top of said column, and braces extending from the sides of the column to the outer ends of the base, said braces passing through said holes in the base for engaging the supporting surface.

6. A scaffold comprising a base adapted to rest on a supporting surface and having brace holes, a supporting column mounted on said base, a spacing and wall-engaging forked member secured to the top of said column, braces extending from the sides of the column to the outer ends of the base, said braces passing through said holes in the base for engaging the supporting surface, and means whereby the effective length of the braces may be changed.

7. A scaffold comprising a base of channel shape adapted to rest on a supporting surface and having brace holes, a supporting column mounted on said base, a spacing and wall-engaging forked member secured to the top of said column, braces extending from the sides of the column to the outer ends of the base, said braces passing through said holes in the base for engaging the supporting surface, and means whereby the effective length of the braces may be changed.

8. A scaffold comprising a base of channel shape, a stud secured to the upper side thereof, a tubular member secured to said stud, braces extending from the sides of said Inemher to the outer ends of the base, a second tubular member telescoped to the first named tubular member, means securing the me1nbers together, a forked plug mounted in the upper end of the second member, and means on the forked plug for receiving a hook and constituting a stop abutting the top of said second tubular member.

9. The combination with spaced scaffold supports severally comprising a base of channel shape, a stud secured to the upper side thereof, a tubular member secured to said stud, braces extending from the sides of said member to the outer ends of the base, a second tubular member telescoped to the firstnamed tubular member, means securing the members together, a forked plug mounted in the upper end of the second member, and means on the forked plug for receiving a hook and constituting a stop abutting the top of said second tubular member.

10. A scaffold comprising a horizontal channel base, a stud mounted thereon in the middle thereof, a tubular standard loosely fitted over said stud and pivoted thereto, a forked member inserted in and secured to the upper end of the standard, said member being adapted to space the standard away from a vertical wall, means secured to the forked member for supporting a platform, and means for bracing the standard.

11. The combination with a platform, of means for freely supporting said platform adjacent a vertical wall comprising spaced supporting columns leaning toward the wall, horizontal channel bases mounted beneath said columns and pivotally connected thereto, forked members secured to said columns for engaging and spacing them away from the Wall, and means depending from the upper part of the columns for supporting the platform. In Witness whereof my hand.'

ALBERT KOLVOORD.

I have hereunto set 

